move haskell-stylish-save to haskell-customize

The immediate motivation is that haskell-modules depends on this
variable due to the previous commit, b6871d1.

Author: bergey

haskell-customize.el

@@ -404,6 +404,13 @@ same vein as `haskell-indent-spaces'."
   :group 'haskell
   :type '(repeat 'string))
 
+;;;###autoload
+(defcustom haskell-stylish-on-save nil
+  "Whether to run stylish-haskell on the buffer before saving.
+If this is true, `haskell-add-import' will not sort or align the
+imports."
+  :group 'haskell
+  :type 'boolean)
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Accessor functions

haskell-mode.el

@@ -820,14 +820,6 @@ Note that negative arguments do not work so well."
                  (const "ghc -fno-code")
                  (string :tag "Other command")))
 
-;;;###autoload
-(defcustom haskell-stylish-on-save nil
-  "Whether to run stylish-haskell on the buffer before saving.
-If this is true, `haskell-add-import' will not sort or align the
-imports."
-  :group 'haskell
-  :type 'boolean)
-
 ;;;###autoload
 (defcustom haskell-tags-on-save nil
   "Generate tags via hasktags after saving."

haskell-modules.el

@@ -23,6 +23,7 @@
 (require 'haskell-navigate-imports)
 (require 'haskell-complete-module)
 (require 'haskell-sandbox)
+(require 'haskell-customize)
 
 (defun haskell-add-import (&optional module)
   "Add an import to the import list.  Sorts and aligns imports,